title: Self-assembled 3D flowerlike hierarchical Fe3O4@Bi2O3 core-shell architectures and their enhanced photocatalytic activity under visible light.
abstract: Three-dimensional (3D) flowerlike hierarchical Fe(3)O(4)@Bi(2)O(3) core-shell architectures were synthesized by a simple and direct solvothermal route without any linker shell. The results indicated that the size of the 3D flowerlike hierarchical microspheres was about 420 nm and the shell was composed of several nanosheets with a thickness of 4-10 nm and a width of 100-140 nm. The saturation magnetization of the superparamagnetic composite microspheres was about 41 emu g(-1) at room temperature. Moreover, the Fe(3)O(4)@Bi(2)O(3) composite microspheres showed much higher (7-10 times) photocatalytic activity than commercial Bi(2)O(3) particles under visible-light irradiation. The possible formation mechanism was proposed for Ostwald ripening and the self-assembled process. This novel composite material may have potential applications in water treatment, degradation of dye pollutants, and environmental cleaning, for example.
authors.affiliation: School of Chemistry and Chemical Engineering, Anhui Univerity, Hefei 230039, PR China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Wang
authors.forename: Shikuo
authors.initials: S
authors.lastname: Li
authors.forename: Xianran
authors.initials: X
authors.lastname: Xing
authors.forename: Fangzhi
authors.initials: F
authors.lastname: Huang
authors.forename: Yuhua
authors.initials: Y
authors.lastname: Shen
authors.forename: Anjian
authors.initials: A
authors.lastname: Xie
authors.forename: Xiufang
authors.initials: X
authors.lastname: Wang
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang